Big voices in big spaces will be heard at “Arias at the Armory” at 8 p.m. Saturday in downtown Syracuse’s Armory Square. Syracuse Opera’s five guest artists will sing highlights from its upcoming 2012-2013 season.

Puccini’s “Tosca,” Stephen Sondheim’s “Sweeney Todd” and Mozart’s “The Marriage of Figaro” will be performed as well as favorite arias, duets, trios, quartets and quintets from Donizetti’s “Lucia di Lammermoor,” Verdi’s “Rigoletto” and Bizet’s “The Pearl Fishers” and “Carmen.”

Fayetteville-Manlius high school student Nick Ziobro will open the program at 7 p.m. Ziobro won the Great American Songbook Vocal Academy and Competition in June in Carmel, Ind.

The concert, at West Jefferson and Franklin streets, is free. The rain location is St. Paul’s Episcopal Cathedral, 310 Montgomery St., Syracuse. For more information, call 475-5915 or visit Syracuse Opera's website.